Manually regulated vacuum assembly for hair clipper

ABSTRACT

A manually regulated vacuum assembly for barber&#39;&#39;s hair clippers comprising a vacuum air-intake attachment attached to a clipper body and connected to a hair-catching device by a hose, a blower pulling air from the hair-catching device and means for manually regulating the rate of air flow through said attachment while continuing said air flow, such manual regulation being by degrees so that any one of many amounts of air flow can be selected.

United States Patent 1191 Keane Mar. 19, 1974 1 MANUALLY REGULATED VACUUM 3,440,681 4/1969 Hixson 15/339 ASSEMBLY FOR HAIR CLIPPER FOREIGN PATENTS OR APPLICATIONS [76] Invent: i gi g Cmmcil Bluffs 804,559 10/1936 France 30/133 owa [22] Filed: Oct. 14, 1971 Primary Examiner-Othell M. Simpson 21 A l N 189 404 Assistant Examiner-J. C. Peters 1 PP 3 Attorney, Agent, 0r'FirmHiram A. Sturges Related US. Application Data [63] Continuation-in-part of Ser. No. 12,287. Feb. 18, [57] ABSTRACT 1970, Pat. No. 3,613,237. r

A manually regulated vacuum assembly for barber's 521 US. 01. 30/133, 15/314 hair clippers mPrising a vacuum air-intake attach- 51 Int. Cl .I. 1326b 19/44 attached a clipper and 58 Field of Search ..'.....-30/133, 41, 41.5; 41.6; hair-catching device by a O56, a blwer Pulling air 4 15/314 339 419, 347 from the hair-catching device and means for manually regulating the rate of air flow through said attachment [56] References cited while continuing said air flow, such manual regulation UNITED STATES PATENTS being by degrees so that any one of many amounts of air flow can be selected. 3,341,944 9/1967 Ligon.....'. .L 30/133 3,357,039 12/1967 Hayward 15/314 11 Claims, 5 Drawing Figures PATENTEI] MAR T 9 I974 SHEH 1 BF 4 FIG. i

PATENTEDMAR 1 9 1974 SHEET 2 BF 4 PATENTEU MAR 1 9 I974 SHEET 3 0F 4 FIG. 3

MANUALLY REGULATED VACUUM ASSEMBLY FOR HAIR CLIPPER This application is a continuation-in-part of the applicants co-pending US. Pat. application Ser. No. 12,287, filed Feb. 18, 1970, and titled: VACUUM AS- SEMBLY FOR I-IAIR CLIPPER,- US. Pat. No. 3,613,237, dated Oct. 19, 1971.

FIELD OF THE INVENTION This invention is in the field of vacuum systems attachable to hair clippers.

DESCRIPTION OF THE PRIOR ART In prior art vacuum systems oftypes attachable to electric hair clippers, there have been serious disadvan tages. I

One prior art disadvantage has been the absence of any way to regulate the amountof air flow through the attachment. As a result of the lack of the concept of regulation, the prior art systems have necessarily been devised so as to have an amount of vacuum pull which is excessive at certain times and too little at other times.

It is important that the vacuum pull be sufficient to pull the air with a force sufficiently great as to prevent line clogging which is clogging of the hose and clipper attachment. To provide enough vacuum pull to prevent line clogging," a great amount of airflow has been provided in the prior art, so great that the screeching noise of the air as it enters the clipper attachment has been an almost intolerable nuisance and has been the reason why many barbers have not purchased vacuum systems. This screeching noise of the incoming air is particularly a nuisance when the clip pers are close to the vcustomers car. This screeching noise is also made a more major problem by the fact that the amount of vacuum pull at the start of barbering must be very great, as set by the size of the blower motor, in order to have enough vacuum pull left after the pores of a conventional vacuum bag have become partially clogged with hair, called bag clogging" in order that there be enough air flow through such a clogged vacuum bag to prevent line clogging of theattachment and hose during the lesser air flow period which begins soon after a bag begins to partially fill with hair.

Once bag-clogging begins, the air flow decreases.

and decreases, becoming weaker and weaker, as a conventional vacuum bag fills with hair.

The only way the industry has had of coping with this problem of gradually weakening air flow has been to put such a high powered motor on the blower that there is substantial air flow even after a vacuum bag has become substantially clogged.

Consequently, such motors tend to pull an excessive amount of air during the period when the vacuum bag is not yet clogged, thus creating an ear-splitting screech" of high volume at the entrance to the clipper attachment.

The above-stated prior art problems have been so great that possibly these have something to do with the fact that the industry has never had, to, my knowledge, a vacuum system on sale in which two or more barbers can cut hair using vacuum hoses leading to the same air blower, and if such a system were proposed, the size of It two barbers work from the same blower and the blower size is doubled for that reason, then there is not only the screech of air entering one attachment, but the barber shop is filled with the screech of air entering two attachments, and with the screech in each attachment multiplied, in the by the large air-pull necessary before substantial bag clogging period by the largeairpull necessary to take care of the above-described vacuum bag clogging factors.

SUMMARY OF THE INVENTION A hair clipper assembly comprising a hair clipper, a hose, a hair clipper attachment, and a hair catching device connected to the hose and a blower,and pulling air fromthe hair catching device, comprising a manually regulatable vacuum attachment for the hair clipper assembly making it possible for the barber to manually curtail the amount of air flow at the entrance to the clipper attachment to reduce the air flow at times when the clipper is being used close to a'customers ears, and permitting a regulation for a greater air flow for cutting parts of the customers hair away from his ears so as to have sufficient air flow to prevent clogging of the attachment and hose.

The manually regulatable vacuum atachment further makes it possible to have two or more clipper and hose assemblies attached to the same blower without excessive vacuum pull and excessive sereechof air entering the vacuum attachment even at times when only one of the two attachments is used and the entire blower force is pulling air through just one attachment, and so that the barber can simply curtail the air flow through that one attachment until it is at a workable flow rate for hari cutting and produces a more moderate amount of the screeching noise, yet using the same air blowing means. I

A further object is to provide a way for a barber to manually regulate the air flow into a vacuum assembly in order to be able to curtail the air flow when the pores of a vacuum bag of a conventional bag-type hair catcher are not yet substantially clogged.

Still another object is to provide this invention with manually regulatable means so constructed that the operator can regulate the air flow by degrees so that many amounts of air flow can be selected, as distinguished from a choice of being on or off as, for example, in the case of an on or off control by means of a switch.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a side elevation of a barber shop room shown with the closer parts of the wall, ceiling, and floor broken away and showing the vacuum assembly of this invention mounted therein with a clipper shown on a storage support.

FIG. 2 is a side elevation in detail of a central part of the vacuum assembly of this invention with other parts removed.

FIG. 3 is a frontal elevation of a cutting trap portion of the invention shown with various parts broken away to reveal other parts shown therebehind.

FIG. 4 is a side elevation of a cutter shown with the vacuum attachment of this invention and a portion of its hose attached thereto, certain parts being broken away.

FIG. 5 is a stop plan view of the parts shown in FIG. 4. de

DESCRIPTION OF THE PREFERRED EMBODIMENT The vacuum assembly for a hair clipper of this invention is generally indicated at in FIG. 1 and is shown as mounted in a barber shop room 12, in which the barber's chair is partially shown as disposed a substantial distance from a back side wall 14 of the shop on which aframe 20 of the vacuum assembly 10 is mounted. The vacuum assembly 10 has an air hose 30, a terminal end of which is suitably attached to a vacuum attachment 50 made in accordance with this invention, and attached to a hair clipper generally indicated at 60.

The hair clipper 60 is better seen in detail in FIGS. 4 and 5 and will be seen to have a body section generally indicated at 70, a back portion of which, shown at 80, serves as a handle.

The hair clipper 60 further has a blade assembly, generally indicated at 90, attached to its forward end and diagrammatically shown here. A portion of the blade assembly 90 is stationary and is shown at 100, and is fastened to the body section 70.

The remainder of the blade assembly is diagrammatically indicated at 120 and is movably attached to the stationary portion 100. The clipper 60 as thus described is of a conventional type, having cutting teeth extending at an acute angle with respect to the length of the clipper, such angle being generally indicated at B in FIG. 4. This angle is substantially midway between a position of being at 90 and another position of being parallel to the length of the clipper body.

The hose 30 leads rearwardly to a suitable connection at 290 to permit air to flow in the direction of the arrow 296 into a lower tube 310 which can be square, as shown in FIG. 3.

The tube 310 extends through a switch and valve housing 312 and into a central portion 320 ofa cuttings trap assembly 330.

The cuttings trap assembly 330 can also be called a cuttings trap 330, and as best seen in FIG. 1, it is attached by means of a frame 350 to the wall 14 of a building whereby it is supported above the floor out of the way and near the ceiling. The cuttings trap assembly 330 has an upper hollow portion generally indicated at 340 which is attached to the frame 350 and also has a lower portion or lower container portion 344 mounted on the underside of the upper portion 340 and removably secured thereto and normally substantially sealed thereby because the lower portion 344 fits into the upper portion snugly and is held there by releasable attachment clip assemblies 346.

The tube 310 can also be called a hollow element 310 and it extends through the upper hollow portion 340 of the trap, and has an open end 348 facing downwardly and spaced a substantial distance from the bottom of the lower container portion 344.

A hollow header 360 extends through an upper part 362 of the upper top portion 340 from the exterior thereof and a filter 370 is disposed between the lower container portion 344 and the header 360 and divides the upper container portion 340 into an upper part 362 and a lower part 320.

The header 360 has opening means therein defined by hollow connectors 390 through which filtered air can pass into the header from the upper side of the filter 370.

The'filter 370 blocks substantially all of the flow of air from the open end 348 upwardly to the header 360.

The building generally indicated at 400, and of which the wall 14 forms a part, is an inhabitable building, and a conduit means 410 is provided which leads from the header 360 to the exterior of the building at an exhaust port or outlet 420. In the conduit means is a blower 424 for blowing the air outside.

The conduit 410 preferably extends upwardly through the ceiling 430 of the building and then outwardly through the side wall 14.

As thus described, air-carrying cuttings falling out of the open end 348 will tend to pass upwardly in the direction of the arrows 402 through the filter 370, whereas the heavier cuttings themselves will fall directly downwardly by gravity as shown by the arrows 450 and can be disposed of by removing the lower container portion 344 periodically.

Referring to FIG. 1, a hollow suction element is there shown at 470 and is attached to the lower tube 310 which can also be called a hollow element 310, whereby it is to the hollow suction element 470 that the rearward end of the hose 30 is attached.

The clipper has a cord 600 which extends to the control housing 520 in a manner such that a considerable part of the length of the cord extending to the clipper follows generally along the length of the hose assembly because the cord is attached to the hose assembly for support by suitable attachment means 610 so that the cord does not swing around in the air separately from the hose assembly to the greater extent that would otherwise be the case during hair clipping motions.

Referring to FIGS. 2 and 3, a pair of forked clipper receivers are there shown at 700 each having two spaced substantially parallel prongs 710 adapted to receive the body of a clipper therebetween. The prongs 710 are spaced apart a lesser distance than the distance which the blade assembly extends in a direction transversely of the body of the clippers, whereby when a clipper is rested between the prongs 710, the prongs will support the clipper against the pull of gravity in the manner shown in FIG. 2.

A movable means generally indicated at 720 in FIG. 2 attaches the forked clipper receiver 700 to the frame, the movable means comprising also a pivot attachment 722 at an end of a long arm 724 which forms a part of the movable means 720. There is one arm for each of the clipper receivers 700 and they are adapted to swing up and down whereby they move downwardly to a limited extent when the receiver 700 attached thereto is supporting a clipper.

A switch means 730 is mounted on the control box or control housing 520, which latter forms part of the frame 20, and the switch 730 is operated so as to shut off the electricity from a power source, not shown, to an electrical receptacle 738 at times when a clipper 700 is disposed in a position for depressing a respective arm 724 and operating the switch 730 whereby power to that respective clipper 60 is shut off because electricity cannot pass from the receptacle 738 through a plug 740 at the end of the cord 600 of the clipper.

On each arm 724 there is connected a valve control rod 790, a portion of which can be seen in FIG. 2 in full lines and the remainder in dotted lines. The rod 790 is attached at its lower end to a respective arm 724 and is attached at its upper end to a sliding valve 800 whereby as the arm 724 is depressed the downward movement of the rod 790 will. cause the valve 800 to depress for sliding across the inner end of the tube 310 so that the sliding valve shuts off air flowthrough the tube 310 so the suction power is not wasted through that tube because of its attachment to a respective hose 600 which works with the clipper 60 which is not in operation.

Conversely, when a clipper 60 is lifted from its clipper receiver 700, then the arm 724 moves upwardly and a spring 860 attached to the upper side of the control housing 520 and attached also to the rod 790 will urge the rod 790 upwardly for raising the valve 800 to open the tube 310, although whenever the arm 724 is urged downwardly by a clipper 60 being disposed on its clipper receiver, the spring 860 will be extended and the valve 800 will close the inner end of the element 470, the inner end being shown at 472.

Referring to FIG. 3, two suction means 470 are shown closeable each by its own valve 80, each valve controlled by its own rod'790, lifted by its own spring 860, and connected to its own arm 724.

Each rod 790- has a vertically extending section 792 extending slidably through the upper side of the tube 310 as seenin FIGS. 2 and 3. i

The cuttings trap assembly 330 can also be called a hair catching device 330 and its upper hollow portion 340 taken together with its lower container portion 344 define a container or container means which can be considered to be generally indicated at 1341. The container 1341 can be considered to have an openable and closeable section S defined by the lower part of the upper hollow portion 340 when taken together with the lower container portion 344.

Air flow line means generally indicated at 1000 in FIG. 2 connects the exit end of the hose 600 with the exhaust port 420. i

In a sense, all parts disposed between the hose attaching means or vacuum attachment 50 and the exhaust port 420 can be considered as defining an air motion assembly A.

'The controllable means generally indicated at 1020 and having as one of its parts the valve 800 is operably correlated with the air motion assembly A for varying rate of flow of air through the air motion assembly A.

The forked clipper lever 720 defines a movable controlling part operably correlated with the remainder of the controllable means 1020 so that when the controlling part 720 is movedin one direction, upwardly, the flow of air proportionately increases, and when the controlling part 720 is moved in the opposite direction, downwardly, the flow of air decreases.

When a clipper 60 is removed from the forked clipper receiver 700, the spring 860 can then open the valve 800 because the vacuum pull on the valve 800 has not yet built up because blower 424 has only then started.

But after the vacuum pull has built up, the position of the valve 800 can be controlled manually by a setting of the clipper receiver 700 in a desired position because the vacuum pull tends to hold the valve 800 in any position set by the clipper receiver 700 because the vacuum causes the valve 800 to tilt out of vertical position and,therefore, to bind frictionally against the forward and rearward vertical surfaces 801 of valve receiving vertical track-openings 802 of a track device 804 attached to the tube 310, the track device 804 Peceiving' the valves 800 respectively and guiding the valves 800 for movement in vertical'directions.

The barber may want less vacuum pull, especially when cutting near the customers ear and to reduce the discomfort caused by the noise of the rush of air into the clipper attachment 50. The barber does this simply by setting the clipper receiver 700 in a lower position to partially close the open valve.

Thus the machine has manual vacuum-pull control and manual control of rate of air flow.

. The blower 424 actually has two parts, a fan housing 2002 and a variable speed motor 2004 which controls the speed of the blower 424.

Speed control wires, not shown, lead from the motor 2004 througha cable 2008 to a motor speed control rheostat 2010 mounted on the front of the control housing 520, as seen in FIG. 1, other power wires to the motor 2004 being shown at 2020 in FIG. 1.

The rheostat 2010 has its control knob protruding .from the forward side of the housing 520 where it is accessible to the operator and in the general vicinity of at least one of the hoses. The rheostat 2010 thereby can also be called a control means or rheostat 2010 in the vicinity of one of the hoses for easy control by an operator and controlling,by means of controlling the variable speed motor 2004, the air flow through an air exhausting assembly generally indicated at 2030 in FIG. 1, which latter is composed of the air blower means or air blower 424 and the conduit means 410 which connects the air blower 424 to the hair catching device of cuttings trap assembly shown at 330, and the hair catching device or cuttings trap assembly 330 and the air hoses 30 and the attaching means or vacuum attachments 50, all together, define an air exhausting assembly 3000 for exhausting air taken in near the clippers.

The slots 2000 in the forward side of the control housing 520 frictionally engage the sides of the forked clipper level-270 with sufficient force to be greater than the effect of the springs 860 so as to cause the forked clipper lever 720 to remain in whatever position it is in, whenever it is empty of the clipper 60.

Because of this, the operator in reaching for the lever 720 at a time when the clipper 60 is not on it, can simply adjust the lever 720 up or down and it will stay in place in a desired amount of air flow through the respective hose 600 and past the respective valve 800. In this way, the lever 720 becomes a part of the controllable means 1020 earlier described for controlling proportionately the flow of air. And yet, when the clipper 60 is put in place, its weight is sufficient to overcome the weight of the hose 600 against the clipper lever 7 20 to automatically weight down the respective clipper lever 720 enough to cause the respective valve 800 to close.

I claim:

1. In combination: a plurality of hair clippers, a plurality of flexible hoses, each hose having an entrance and an exit, a plurality of attaching means each attaching one end of one of said hoses to one of said hair clippers in a manner for directing hair cuttings from the respective clipper through the respective attachment means and into the entrance of the respective hose when air is moving through the respective attaching means, each of said attaching means having a hairreceiving inlet opening and an air exit opening to which latter the respective hose is attached, a hair-catching device, said hair-catching device having air entry port means and an air exit port, means connecting the exit ends of said hoses to said entry port means of said haircatching device, an air blowing means, said air blowing means having an inlet and an exhaust port, conduit means connecting said air blowing means inlet to said hair-catching device exit port, all parts disposed between said respective hose attaching means inlet opening and said hair-catching device entry port means defining a plurality of air motion assemblies respectively, a plurality of controllable valve means each operably correlated with a different one of said air motion assemblies for varying by degrees throughout many amounts the rate of flow of air through said air motion assemblies, each of said controllable valve means having a controlling part movable in two opposite directions, said movable controlling parts each being operably correlated with the remainder of the respective one of said controllable valve means so that when said controlling part is moved in said opposite directions the flow of air through the respective attaching means air receiving opening proportionally increases and decreases respectively by degrees throughout many amounts.

2. The combination of claim 1 in which at least one of said controlling parts is a forked clipper receiver, said clipper receiver and said clipper being cooperatively shaped so that the forward end of said clipper can be supported by said receiver with the remainder of said clipper hanging downwardly from its forward end.

3. The combination of claim 1 in which said control means comprises at least one of said air motion assemblies having a section having an annular terminal portion through which air flows substantially in a line, said annular terminal portion lying substantially in a plane transverse to said line of air flow, said one air motion assembly having a valve-receiving housing portion adjacent said annular terminal portion, said valvereceiving portion extending away from said annular terminal portion in a direction transverse to said line of air flow, the respective one of said valve means being slidable in said valve-receiving portion for sliding across said annular terminal portion for sealing said annular terminal portion to regulate air flow therethrough, means for holding said respective valve means in a position in which it has been set.

4. The combination of claim 1 in which said air blowing means and said conduit means together define an air exhausting assembly, said air exhausting assembly having controllable means associated therewith for varying the flow of air through said air exhausting assembly.

5. The combination of claim 4 in which control means in the vicinity of one of said hoses for control by an operator is connected to and controls said controllable means of said exhausting assembly.

6. In combination: a plurality of hair clippers, a plurality of flexible hoses, each hose having an entrance and an exit, a plurality of attaching means each attaching one end of one of said hoses to one of said hair clippers in a manner for directing hair cuttings from the respective clipper through the respective attachment means and into the entrance of the respective hose when air is moving through the respective attaching means, each of said attaching means having a hairreceiving opening and an air exit opening to which latter the respective hose is attached, a hair-catching device, said hair-catching device having air entry port means and an air exit port, means connecting the exit ends of said hoses to said entry port means of said haircatching device, an air blowing means, said air blowing means having an inlet and an exhaust port, conduit means connecting said air blowing means inlet to said hair catching device exit port, said air blowing means and said conduit means, said hair catching device and said hoses and said attaching means, all together defining an air exhausting assembly, said air exhausting assembly having controllable means associated therewith for varying the flow of air through said air exhausting assembly by degrees throughout many air flow rates.

7. The combination of claim 6 in further combination with: control means having a manually movable part remote from said controllable means and in the general vicinity of one of said hoses, and said control means having connecting means operably connecting said manually movable part to said controllable means of said exhausting assembly to increase and decrease the flow of air through said exhausting assembly by degrees throughout many air flow rates.

8. The combination of claim 7 in which said control means and said controllable means are capable of varying the rate of air flow in increments through a wide range of rates of air flow.

9. The combination of claim 6 in further combination with: control means having a manually movable part in the general vicinity of one of said hoses, and said control means having connecting means operably connecting said manually movable part to said controllable means of said exhausting assembly to increase and decrease the flow of air through said exhausting assembly.

10. The combination of claim 6 in further combination with: control means having a manually movable part in the general vicinity of one of said hoses, and said control means having connecting means operably connecting said manually movable part to said controllable means of said exhausting assembly to increase and decrease the flow of air through said exhausting assembly, said connecting means comprising an electrical circuit.

11. The combination of claim 7 in which said connecting means is an electrical circuit. 

1. In combination: a plurality of hair clippers, a plurality of flexible hoses, each hose having an entrance and an exit, a plurality of attaching means each attaching one end of one of said hoses to one of said hair clippers in a manner for directing hair cuttings from the respective clipper through the respective attachment means and into the entrance of the respective hose when air is moving through the respective attaching means, each of said attaching means having a hair-receiving inlet opening and an air exit opening to which latter the respective hose is attached, a hair-catching device, said hair-catching device having air entry port means and an air exit port, means connecting the exit ends of said hoses to said entry port means of said hair-catching device, an air blowing means, said air blowing means having an inlet and an exhaust port, conduit means connecting said air blowing means inlet to said hair-catching device exit port, all parts disposed between said respective hose attaching means inlet opening and said hair-catching device entry port means defining a plurality of air motion assemblies respectively, a plurality of controllable valve means each operably correlated with a different one of said air motion assemblies for varying by degrees throughout many amounts the rate of flow of air through said air motion assemblies, each of said controllable valve means having a controlling part movable in two opposite directions, said movable controlling parts each being operably correlated with the remainder of the respective one of said controllable valve means so that when said controlling part is moved in said opposite directions the flow of air through the respective attaching means air receiving opening proportionally increases and decreases respectively by degrees throughout many amounts.
 2. The combination of claim 1 in which at least one of said controlling parts is a forked clipper receiver, said clipper receiver and said clipper being cooperatively shaped so that the forward end of said clipper can be supported by said receiver with the remainder of said clipper hanging downwardly from its forward end.
 3. The combination of claim 1 in which said control means comprises at least one of said air motion assemblies having a section having an annular terminal portion through which air flows substantially in a line, said annular terminal portion lying substantially in a plane transverse to said line of air flow, said one air motion assembly having a valve-receiving housing portion adjacent said annular terminal portion, said valve-receiving portion extending away from said annular terminal portion in a direction transverse to said line of air flow, the respective one of said valve means being slidable in said valve-receiving portion for sliding across said annular terminal portion for sealing said annular terminal portion to regulate air flow therethrough, means for holding said respective valve means in a position in which it has been set.
 4. The combination of claim 1 in which said air blowing means and said conduit means together define an air exhausting assembly, said air exhausting assembly having controllable means associated therewith for varying the flow of air through said air exhausting assembly.
 5. The combination of claim 4 in which control means in the vicinity of one of said hoses for control by an operator is connected to and controls said controllable means of said exhausting assembly.
 6. In combination: a plurality of hair clippers, a plurality of flexible hoses, each hose having an entrance and an exit, a plurality of attaching means each attaching one end of one of said hoses to one of said hair clippers in a manner for directing hair cuttings from the respective clipper through the respective attachment means and into the entrance of the respective hose when air is moving through the respective attaching meanS, each of said attaching means having a hair-receiving opening and an air exit opening to which latter the respective hose is attached, a hair-catching device, said hair-catching device having air entry port means and an air exit port, means connecting the exit ends of said hoses to said entry port means of said hair-catching device, an air blowing means, said air blowing means having an inlet and an exhaust port, conduit means connecting said air blowing means inlet to said hair-catching device exit port, said air blowing means and said conduit means, said hair catching device and said hoses and said attaching means, all together defining an air exhausting assembly, said air exhausting assembly having controllable means associated therewith for varying the flow of air through said air exhausting assembly by degrees throughout many air flow rates.
 7. The combination of claim 6 in further combination with: control means having a manually movable part remote from said controllable means and in the general vicinity of one of said hoses, and said control means having connecting means operably connecting said manually movable part to said controllable means of said exhausting assembly to increase and decrease the flow of air through said exhausting assembly by degrees throughout many air flow rates.
 8. The combination of claim 7 in which said control means and said controllable means are capable of varying the rate of air flow in increments through a wide range of rates of air flow.
 9. The combination of claim 6 in further combination with: control means having a manually movable part in the general vicinity of one of said hoses, and said control means having connecting means operably connecting said manually movable part to said controllable means of said exhausting assembly to increase and decrease the flow of air through said exhausting assembly.
 10. The combination of claim 6 in further combination with: control means having a manually movable part in the general vicinity of one of said hoses, and said control means having connecting means operably connecting said manually movable part to said controllable means of said exhausting assembly to increase and decrease the flow of air through said exhausting assembly, said connecting means comprising an electrical circuit.
 11. The combination of claim 7 in which said connecting means is an electrical circuit. 